Survey
* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project
Download Linking Asteroids and Meteorites through Reflectance
Document related concepts
no text concepts found
Transcript
Conversations with the Earth Tom Burbine [email protected] Quiz on Thursday • You can bring in your hand-written mineral sheets • Cation – positively charged ion • Anion – negatively charged ion • NaCl – Na+ is the cation and Cl- is the anion Mineral classes that we studied • • • • • Silicates – contain silicon and oxygen Carbonates – contain (CO3)2− Sulfates – contain (SO4)2− Halites – contain F−, Cl−, Br−, or I− as an anion Oxides - contain oxygen (O2-) that is bonded to one or more metal ions • Sulfides - contain sulfur (S2−) as the anion • Native elements Graphite • • • • • C Used in pencils Greasy feel Grey streak Electrical conductor Olivine • (Mg,Fe)2SiO4 • Green, no cleavage • Olivine and high pressure structural variants make up over 50% of the Earth's upper mantle Biotite • K(Mg,Fe)3AlSi3O10(F,OH)2 • Sheets • Dark color Galena • • • • PbS Cubes Gray streak Lead ore Pyrite • • • • • FeS2 Hardness 6 to 6.5 Gray streak Can form cubes Ore for sulfur Hematite • Fe2O3 • Reddish streak • Metallic or non-metallic luster Fluorite • CaF2 • Hardness of 4 • Colorless, purple, green, yellow Halite • • • • NaCl Salt Cubes Results from the drying up of lake beds or seas Muscovite • KAl2(AlSi3O10)(F,OH) • Comes in sheets • Clear Talc • Mg3Si4O10(OH)2 • In loose form, it is known as talcum powder • Most tailor's chalk is talc Amphibole • Ca2(Mg,Fe,Al)5(Al,Si)8O22(OH)2 • Prisms with cleavage at 56o and 124o • Fibrous varieties used as fireproof clothing Calcite • CaCO3 • Single calcite crystals display an optical property called double refraction Garnet • • • • Mg3Al2(SiO4)3 Hardness of 7 Forms dodecahedrons Gemstone Gypsum • CaSO4·2H2O • Hardness of 2 • Colorless, white, or gray Dolomite • CaMg(CO3)2 • Fizzes in dilute HCl if powdered Quartz • SiO2 • second most abundant mineral in the Earth's continental crust Chalcopyrite • • • • CuFeS2 Hardness of 3.5-4 Dark gray streak source of ignition in early firearms Chlorite • (Mg,Fe)3(Si,Al)4O10 • Very soft • The powder generated by scratching is green. • Feels oily when rubbed between the fingers. Sphalerite • (Zn,Fe)S • Smells like rotten eggs if scratched/powdered • Ore of zinc Plagioclase feldspar • CaAl2Si2O8 • Has striations Magnetite • Fe3O4 • most magnetic of all the occurring minerals on Earth naturally Augite (pyroxene) • (Ca,Na)(Mg,Fe,Al)(Si,Al)2O6 • Cleavages at nearly right angles Potassium feldspar (Orthoclase) • KAlSi3O8 • Usually pinkish Kaolinite • Al2Si2O5(OH)4 • soft, earthy, usually white mineral • Produced by weathering of feldspars • main component in porcelain Any Questions?
Related documents